Hi mama! Best to check with your OB or pedia muna about collagen supplements while breastfeeding, some are safer than others and they'd know best kung ano ang okay for you and baby. A few of my mum friends took collagen after birth, pero they all cleared it with their doctor first kaya mas natulog sila ng mahimbing, hehe! Your milk supply and baby's health come first, so better safe than sorry talaga.